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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >STUDY OF INTERACTION OF EP AND AW ADDITIVES WITH DISPERSANTS USING XANES
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STUDY OF INTERACTION OF EP AND AW ADDITIVES WITH DISPERSANTS USING XANES

机译：用XANES研究EP和AW添加剂与分散剂的相互作用。

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摘要

The chemical interaction of two kinds of dispersants (bis-succinimide dispersant and borated bis-succinimide dispersant) with four kinds of antiwear (AW) and extreme pressure (EP) additives (zinc dialkyldithiophosphate, dialkyldithiophosphate ester, diphenylphosphate ester and dialkyldithiocarbamate) has been investigated under different contact pressures. The chemical compositions of the tribofilms have been studied by B, N, P and S X-ray absorption near edge structure (XANES) spectroscopy. The N K-edge XANES analysis has been used to follow the reaction pathway of amine and imide functional groups in the dispersants and their interactions with EP and AW additives. It has been found that AW additives react with amine to form amine phosphate at low load. However, at high load, there is a good evidence for the formation of a nitrate phase in the tribofilms. the first direct observation of oxidative dispersant loss in the rubbing contact. On the other hand, EP additives behave differently and in general are less reactive. The B K-edge XANES has been employed to follow the interaction of borated dispersant with the EP and AW additive. In general, boron originally in the trigonal coordination, is converted to a tetrahedral coordination form in the process of tribofilm formation.
机译：研究了两种分散剂（双琥珀酰亚胺分散剂和硼酸化双琥珀酰亚胺分散剂）与四种抗磨（AW）和极压（EP）添加剂（二烷基二硫代磷酸锌，二烷基二硫代磷酸酯，二苯基磷酸酯和二烷基二硫代氨基甲酸酯）的化学相互作用。在不同的接触压力下。摩擦膜的化学成分已通过B，N，P和S X射线吸收近边缘结构（XANES）光谱进行了研究。 N K-edge XANES分析已用于追踪分散剂中胺和酰亚胺官能团的反应路径以及它们与EP和AW添加剂的相互作用。已经发现，AW添加剂在低负荷下与胺反应形成磷酸胺。然而，在高负荷下，有充分的证据表明在摩擦膜中形成了硝酸盐相。首先直接观察到摩擦接触中氧化分散剂的损失。另一方面，EP添加剂的行为不同，通常反应性较低。 B K-edge XANES已被用于跟踪硼酸化分散剂与EP和AW添加剂的相互作用。通常，最初在三角形配位中的硼在形成摩擦膜的过程中会转变成四面体配位形式。

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